Figure 30. --Male and female sea lampreys at moment of extrusion of 

 eggs and milt. Note small cloud of sand grains behind 

 the pair which have been stirred upty the vibration of 

 their bodies during the act. (Ocqueoc River, Stations 

 2L-M, June 9, 19U8.) 



Figure 31. — Male and female sea lampreys in spawning act. Note how 

 the tail of the male is locked about the body of the 

 female. (Ocqueoc River, Stations 2L-M, June 9, 19li8.) 



- 98 - 



